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<p class="MsoPlainText">I got a question about 6.61 (14th & 13th ed.), 6.55 (12th ed.), 6.53 (10th and 11th ed.).<o:p></o:p></p>
<p class="MsoPlainText">This question asks which are impossible combinations of n and l. Hopefully you did this<o:p></o:p></p>
<p class="MsoPlainText">problem and understood there is no 1p or 2d.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I'm sending this to ask you about something like a 6f. Can that exist? Of course it does.<o:p></o:p></p>
<p class="MsoPlainText">Think about exp 7 you did and things we covered in class. Hydrogen has 1 electron in the<o:p></o:p></p>
<p class="MsoPlainText">1s subshell in its ground state. Are there other levels, such as the 2nd (n=2), 3rd (n=3), <o:p></o:p></p>
<p class="MsoPlainText">etc.? Of course there are. There's simply no electrons present in those shells until the 1s<o:p></o:p></p>
<p class="MsoPlainText">electron is excited there by an input of energy to get an excited state. Just because there<o:p></o:p></p>
<p class="MsoPlainText">are no electrons in an 8s or 6g or 10d, etc., subshell in the ground states of any of the<o:p></o:p></p>
<p class="MsoPlainText">known elements doesn't mean the subshells don't exist. Remember, there was a time we<o:p></o:p></p>
<p class="MsoPlainText">didn't even know about the elements in the bottom two rows with electrons in the 4f and 5f.<o:p></o:p></p>
<p class="MsoPlainText">Does that mean they didn't exist? Of course they did, we just hadn't discovered elements<o:p></o:p></p>
<p class="MsoPlainText">with electrons in those subshells yet.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I hope this clears up any questions about this.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Dr. Zellmer<o:p></o:p></p>
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